This figure shows the difference in instrumentally determined surface temperatures between the period January 1999 through December 2008 and "normal" temperatures at the same locations, defined to be the average over the interval January 1940 to December 1980. The average increase on this graph is 0.48 °C, and the widespread temperature increases are considered to be an aspect of global warming.

Data source

This plot is based on the NASA GISS Surface Temperature Analysis (GISTEMP), which combines the 2001 GISS land station analysis data set (Hansen et al. 2001) with the Rayner/Reynolds oceanic sea surface temperature data set (Rayner 2000, Reynolds et al. 2002). The data itself was prepared through the GISTEMP online mapping tool, and the specific dataset used is available here. This data was replotted in a Mollweide projection with a continuous and symmetric color scale. The smoothing radius is 1200 km, meaning that the reported temperature may depend on measurement stations located up to 1200 km away, if necessary.

Related images

• 
  "Global cooling" of 1965-74

Copyright

This figure was prepared by Robert A. Rohde from public domain data and is incorporated into the Global Warming Art project.

Image from Global Warming Art

This image is an original work created for Global Warming Art. Please refer to the image description page for more information.

Энэхүү баримт бичгийг GNU Free Documentation License, Хувилбарын нөхцлийн дагуу хуулах, түгээх болон/эсвэл өөрчлөх зөвшөөрөл олгосон. 1.2 эсвэл Чөлөөт програм хангамжийн сангаас нийтэлсэн дараагийн хувилбар; Инвариант хэсэггүй, нүүрэн талын текстгүй, арын хавтастай текстгүй. Лицензийн хуулбарыг GNU Free Documentation License гэсэн хэсэгт оруулсан болно.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue

	Энэ файл нь Creative Commons Attribution-Share Alike 3.0 Unported лицензтэй байна.
	Та чөлөөтэй: хуваалцах – бүтээлийг хуулбарлах, түгээх, дамжуулах ремикс хийх – ажлыг тохируулах Дараах нөхцөлд: хамаарал – Та зохих кредитийг өгч, лицензийн холбоосыг өгч, өөрчлөлт оруулсан эсэхийг зааж өгөх ёстой. Та үүнийг ямар ч боломжийн аргаар хийж болно, гэхдээ лиценз олгогч таныг эсвэл таны хэрэглээг зөвшөөрөхгүй. адилхан хуваалцах – Хэрэв та материалыг дахин найруулах, хувиргах эсвэл бүтээх юм бол same or compatible license-ийн дагуу өөрийн хувь нэмрийг эх хувьтай нь түгээх ёстой.
	This licensing tag was added to this file as part of the GFDL licensing update.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue

References

1. Hansen, J., R. Ruedy, M. Sato, M. Imhoff, W. Lawrence, D. Easterling, T. Peterson, and T. Karl (2001). "A closer look at United States and global surface temperature change". J. Geophys. Res 106: 23947-23963.
2. Rayner, N. (2000) HadISST1 Seaice and sea surface temperature files. Hadley Center, Bracknell, U.K.
3. Reynolds, R.W., N.A. Rayner, T.M. Smith, D.C. Stokes, and W. Wang (2002). "An improved in situ and satellite SST analysis for climate". J. Climate 15: 1609-1625. doi:10.1175/1520-0442(2002)015<1609:AIISAS>2.0.CO;2

This image was uploaded in the JPEG format even though it consists of non-photographic data. This information could be stored more efficiently or accurately in the PNG or SVG format. If possible, please upload a PNG or SVG version of this image without compression artifacts, derived from a non-JPEG source (or with existing artifacts removed). After doing so, please tag the JPEG version with {{Superseded|NewImage.ext}} and remove this tag. This tag should not be applied to photographs or scans. If this image is a diagram or other image suitable for vectorisation, please tag this image with {{Convert to SVG}} instead of {{BadJPEG}}. If not suitable for vectorisation, use {{Convert to PNG}}. For more information, see {{BadJPEG}}.

derivative works

Derivative works of this file:  Climate-change-template.jpg

• File:Global Warming Map-he.jpg
• File:Opwarming van de Aarde map.png